folmer



W..F. FOLD/IER,

CAMERA CARRIAGE.

APPLICATION HLED Amas. |914.

1,1 96,096. Patented Aug. 29, 1916.

UNITED STATES PATENT OFFICE.

WILLIAM F. FOLMER, OF ROCHESTER, NEW YORK, ASSIGNOR TO EASTMAN KODAK COMPANY, OF ROCHESTER, NEWv YORK, A CORPORATION OF NEW YORK.

CAMERA-CARRIAGE.

Application filed April 25, 1914.

To @ZZ yifi/0m t may concern:

Be it known that I, WILLIAM F. FoLMEn, of Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Camera- Carriages; and I do hereby declare the fol lowing to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, and to the referencenumerals marked thereon.

My present invention relates to photog raphy and more particularly to photographic cameras and it has for its object to provide an anti-friction mount for camera carriages whereby they may be moved back and forth on the bed for focusing or other purposes with little effort and with a smooth rolling motion,

A further object is to provide a rolling contact between the parts that will not be interrupted by the lodgment of less than an unusual quantity of dirt or foreign matter in the track of the carriage.

To these and other ends the invention consists in certain improvements and combinations of parts all as will he hereinafter more fully described, the novel features being pointed out in the claim at the end of the specification.

In the drawings: Figuie l is a rear elevation of a camera and camera bed consti-noted in zmeordance with and illustrating one embodiment of my invention, the track or bed being shown in transverse section; Fig. .f2 is an enlarged top plan view of the running gear of the carriage and a fragment of the track, and Fig. 3 is a detail section through one of the rollers and. its hearings on the line 3-3 of Fig. 2. Similar reference numerals throughout the several figures indicate the same parts.

The present improvements are particularly useful when embodied in the hulkier types of cameras such as portrait cameras and the larger' sizes of view cameras in which either the front board or the hack, or sometimes both, are slidably mounted on the hed and moved relatively to effect changes of focus and I have illustrated the invention in connection With such a camera and as embodied in the mounting of the Specification of Letters Patent.

Patented A110'. 29, 1916.

Serial No. 834,310.

back which carries the sensitized material and the focusing screen or ground glass necessarily make it rather heavy and diflicult to move with precision.

Referring more particularly to the drawings, l indicates the bed comprising in the present instance three longitudinal rails. Mounted on the ybed is the camera casing or back 2 carrying the ground glass 3 and supported on a carriage 4l comprising upper and lower transverse holsters 5 and 6. EX- tending longitudinally of the bed and fastened at their ends by screws 7 to the under sides of two of these lower holsters S (only one of which is shown) are two plates 8 having upwardly turned journal lugs 9 at opposite sides of openings i() therein. Supported in these lugs are axles ll on which turn rollers The holsters (3 of the carria are recessed at lf3 to accommodate the lugs and rollers. These rollers l2 rest in V-shaped tracks 14 formed in or otherwise provided upon the two outside rails of the hed l, the front and rear rollers of the respective plates S occupying the respective tracks, The peripheries of the rollers are also V-shaped to conform generally to the tracks, that is, their tread surfaces converge and rest evenly against the inclined sides of the tracks or grooves, giving an extended hearing surface. These tread surfaces do not, however, intersect. On the other hand. the apex of the periphery, is cutaway in each instance hy a V-shaped peripheral groove l5 having an inverse relationship to the groove of the track as shown in Fig. 3, or, in other words, intersecting the angle of the hearing surfaces of the roller. In this way a diamond-shaped space 16 is left in the angle of the track. By reason of this space dirt or other foreign matter such as a pin, for instance, lodging in the tracks, will lie in the extreme angle at th@ bottoms hereof and the rollers will. he enabled to pass smoothly over, out of contact and bearing broadly only on the upper inclined sides which are not capable of retaining an obstruction.

The camera may he provided with the usual or any preferred mechanism for propelling it along the bed. In the present instance a transverse shaft carries a pinion 17 meshing with a rack 18 on the central rib o1 the bed 1 and turned by means of termina knobs 19 at either side.

I claim as my invention:

rlhe combination with a horizontally disposed hed provided with a groove having converging Walls to forni a Vshaped track opening upwardly, of a camera carriage movable on the hed and provided with a supporting roller having V-shaped or converging tread surfaces cope 'ating with the track, said roller being provided with a V-shaped groove on its periphery in inverse relationship to the groove of the track to leave a diamond shaped space in the angle l5 of the track beneath the roller.

WlLLAM F. FOLMER. Witnesses:

GEO. C. ROCKWELL, H. J. POTTER.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

